Comments on my river played here? Reraise?? Semi coordinated board, look like 89 is a legit possibility

PokerRoom No-Limit Hold'em, $2 BB (10 handed) from (Format: FlopTurnRiver)

UTG ($191.50)
Hero ($99.00)
UTG+2 ($125.10)
MP1 ($154.80)
MP2 ($113.50)
MP3 ($131.10)
CO ($95.85)
Button ($44.05)
SB ($120.50)
BB ($99.60)

Preflop: Hero is UTG+1 with 6, 6.
1 fold, Hero calls $1, 4 folds, CO calls $1, 1 fold, SB completes, BB checks.

Flop: ($5) 3, Q, 7 (4 players)
SB checks, BB checks, Hero checks, CO checks.

Turn: ($5) 6 (4 players)
SB checks, BB checks, Hero bets $3, CO calls $3, SB folds, BB folds.

River: ($11) T (2 players)
Hero bets $6, CO raises to $12, Hero calls $6.

Final Pot: $35

Results in white below:
Hero has 6d 6c (three of a kind, sixes).
CO has Th 7s (two pair, tens and sevens).
Outcome: Hero wins $35.

I saw results already, but before I did, I thought he had QT and I wouldve blasted him.

Am I the only one raising this PF? I don't like that limp in EP. On the flop, I'm throwing out a feeler bet, but since you didn't do that you're turn play is fine. River...I'm easily raising this to about $30. I really don't think an 89s type hand is a possibility because I would expect a fold/raise from that on the turn rather than the cold call.

I play it the same, except I bet a bit more. $4 on the turn, $10 on the river. I don't re-raise that river fearing a straight or slowplayed higher set. I agree that 98 is a possibility, as is 77 (QQ less so due to lack of raise preflop). Of course, if I have a read on him as a donk I probably push the river when he raises, after seeing this hand I would definetely do that in the future, but against the average player he has the straight or higher set too often to make that profitable I think.

This really feels like a situation where I win a small pot or lose a big one if I reraise. I just cant see this guy not raising me with a smaller set after I made mine and bet the turn. Q 10 would mean he limped Q10 and then checked when he hit top pair after everyone checks to him. Turns out he has 107 but I'm still not sure he calls a big rereaise there with 2 pair. The pot is still small compared to our stacks, my reraise opens it up to him making me make a decision for all my chips and he probably only does it with a hand that beats me 1010, 89, or even a slow played 45.